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A method of producing cellulosic pulp WO 1991006700 A1
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FSCN - High Yield Pulping Research Profile)
Innventia (STFI).
STFI (Innventia).
Innventia (STFI).
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1991 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

Mechanical and chemimechanical cellulose pulp, particularly paper pulp, is produced at a low energy input by disintegrating and beating wood material in one or more stages. Acccording to the invention, a substance capable of forming complexes with polyvalent metal ions, particularly calcium ions, so-called complexing agent, is added to the wood material prior to the beating process in order to replace said calcium or other polyvalent metal ions with sodium ions, therewith a further reduction in the energy input is obtained.

Place, publisher, year, edition, pages
1991.
Keyword [en]
ion exchange, complexing agent, mechanical pulping, chemimechanical pulping, low consistency refining, high consistency refiningchanical pulping, chemimechanical pulping, low consistency refining, high consistency refining
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-29426OAI: oai:DiVA.org:miun-29426DiVA: diva2:1051899
Patent
SE WO 1991006700 A1 (1991-05-16)
Available from: 2016-12-05 Created: 2016-12-05 Last updated: 2016-12-13Bibliographically approved

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https://www.google.com/patents/WO1991006700A1?cl=en&dq=engstrand+sjögren+patent&hl=sv&sa=X&ved=0ahUKEwjOz7W75tvQAhUDApoKHas-CRgQ6AEIHDAA

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